Distributed database using indexed into tags to tracks events ac

Details Distributed database using indexed into tags to tracks events ac Distributed database using indexed into tags to tracks events ac

1997-10-15

1999-07-13

Amsbury, Wayne

Data processing: database and file management or data structures

Database design

Data structure types

707 2, 707101, 707104, 707201, 707203, 707511, G06F 1730

Patent

active

059240962

ABSTRACT:
Methods and systems are provided for synchronizing local copies of a distributed database, such as a master copy and a partial copy stored in a replica or in a cache. Each data item in the database has an associated timestamp or other tag. An index into the tags in maintained. The tag index may be used to create an event list to reduce the time and bandwidth needed to synchronize the local copies. The tag index may also be used to create a virtual update log, thereby removing the need to maintain one or more physical logs recording the history of the copies.

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